锰结核是海洋底部的含多种金属的结核体,主要由锰和铁的氧化物、氢氧化物层所组成。最近我们用反符合屏蔽低本底γ谱仪测量了太平洋底锰结核样品的放射性。样品平均直径约4cm,重量75.2g。对测得的γ能谱进行分析,发现其中含有铀、钍系放射性。 测量装置和安排如图1所示。样品贴近主 Manganese nodules are nodules of many metals at the bottom of the oceans and consist mainly of oxides and hydroxides of manganese and iron. Recently, we measured the radioactivity of samples from Pacific Bottom Manganese Tuberculosis using an anti-shielded, low-background gamma spectrometer. The average diameter of the sample is about 4cm and the weight is 75.2g. The measured gamma spectra were analyzed and found to contain uranium and thorium radioactivity. Measurement devices and arrangements shown in Figure 1. Sample close to the main